Needle holding means for hypodermic needle honing devices or the like



March 4, 1952 POST 2,588,160

NEEDLE HOLDING MEANS FOR HYPODERMIC NEEDLE HONING DEVICES OR THE LIKE Filed Nov. 1, 1948 IN V EN TOR.

lea W052 Patented Mar. 4, 1952 F F I CE NEEDLE HOLDING MEANS FOR HYPO- DERMIC NEEDLE HONING DEVICES OR THE LIKE Ernest R. Post, Washington, D. 0.

Application November 1, 1948, Serial No. 57,748

1 Claim.

1 i This invention relates to quick-release chuck means for firmly gripping a shank, and more specifically to such means for use in a needle holder for a hypodermic needle honing device. To furnish an illustrative background for this chuck means, the honing device will be briefly described in this specification.

The object of the present invention is to construct a quick-release chuck means for the hypodermic needle holder or honing device, which will hold the needle shank firmly in any rotational and .1;

axial adjustment in the central opening of the holder through which the needle is inserted, to

' maintain it in proper honing position.

Another object is to make a quick-release chuck means comprising a body portion having said members to grip said needle shank firmly,

and manually operated means for moving said wedging means in one direction to cause said members to grip said shank, and in the other direction to release it.

Another object is to make the above chuck with the needle gripping members, equi-angularly spaced and having springs for normally biasing them outwardly.

Another object is to construct the above chuck means with a ring having internal cam portions providing the wedging action against the outer ends of said three needle gripping members when the ring is turned in one direction through less than 120, and releasing the needle when the ring is turned back.

Another object is to provide a projecting lug on said ring to serve as a knob or handle for easier actuation of-the ring with the fingers.

Another object is to provide means in the holder for fixing the chuck means in any rotational position, so as to place the projecting lug in a convenient operating range- Other and more specific objects will appear in the following detailed description, having reference to the accompanying drawings, where- 1n:

Figure 1 is a front elevational view of a hypodermic needle honing device with the quick-release chuck means for holding a needle in position to be honed,

Fi ure 2 is a transverse section taken on the lines 2-2 of Figure l, and

Figure 3 is a longitudinal section taken through the quick release chuck means for gripping the needle to be honed.

Briefly described, the needle honing device with which the quick-release chuck is associated, includes a plastic base board I, a base 2 of metal with chrome plating and the rest of the parts 2 are also .of chrome-plated metal, except the hone 3.

The hone 3 is oval in section and is held in close-fitting sockets in bearings 4 and 5 at its ends rotatably mounted in supports 6 and 1 respectively. The bearing 4 is .provided with mechanism to effect rotation of the hone 3 and is operated by the knob I I g A shaft I3 is mounted in smaller supports I l and I5 so as to extend in a direction parallel to the hone 3. A needle holder consisting of a quick-release clutch means includes a circular ring-like frame I1 with a, circular bore therein and a lower widened portion having a bore to receive the shaft I3 and upon which the ringlike frame is slidably mounted. A stepped annular body designated in general by the reference character I6 has a radially reduced outer portion rotatably mounted in the circular bore of the ring-like frame for rotational adjustment therein. The opposite or inner side of the annular body It; is annularly enlarged and forms portion of the annular body I 6 for holding, the

latter in ad usted position. The enlarged inner end of the body l5 carries an outwardly directed and integral annular flange H5. The annular body I6 has an axial opening l9 therein for insertion of the hypodermic needle 20 to be sharpened. The opening I9 is normal to and spaced from the shaft I3 a distance substantially e-ual to the difference in height between the shaft and hone.

The body portion I6 also has three radially slidable equi-angularly spaced grinning members 2| about the opening IS. A ring 22 is moun d rotatably on the enlarged portion of the annular body between and in contact with the adjacent side of the ring-like frame I! and the flange [6 as shown and which mounting is operative to eliminate any undue wobbling or vibratory movements of the ring 22 during the use of the needle honing device, and has three internal wedgin cams 23 for coo eration with the outer ends of said gripping members to push them inwardly simultaneously to grip the needle shank firmly. upon turning the ring 22 in one direction, and releasing it when the ring is turned in reverse direction. Springs 24 are provided in the body portion I6 for biasing said gripping members 2| radially outwardly against their respective cams 23.

The ring 22 is provided with a short knob 25, extending from the periphery thereof, to facilitate turning the ring with the fingers in one direction or the other. By releasing the set screw [8; the body portion l6.maybe turnedrto any angular position: to provide the range oi! movement of the knob 25 in any suitable location about said needle holder.

The chuck specifically described and claimed herein has been illustrated as holding 'a hypoder mic needle for the honing thereof, but itis to beunderstood that while the chuck may be constructed for the holding of workt'of larger di-- mensions, it was primarily designed for the holding of small shanked elements. The'chuck in'-- comprising, a. circular ring-like fi'amehavin'g aicirculan bore. and'a lower widened portionzwith a;bore-itherein,.,a,shaft' engagedlthrough the bore of therlowerwidenedeportion to slidably support theframe,, a; stepped annular body having a radially reduced outer: portion rotatably mount+ ed" in the circular bore for rotational adjust! ment andanenlarged inner portion forming an outwardly facing annular. circumscribing, radial shoulder'disposed against theinn'er portion of the inner annular face of the frame, a set screw radially threaded 1 through the top of the .frame toreng-agethetperiphery of the reduced outer portion z-ofithe. bodyand .hold the latter in adjusted .positionftherinner endoi the body havin ant integral annularhradial: flange, a ring, ro- 'tatably mounted onithe. enlarged inner portion of the body between and in contact with the frame and flange, said-rlng;having-a plurality ofsuccessive tapered, arcuate recesses around its inner face forming wedging cams, a similar number of equidistantly spaced radial gripping pins slidably mounted in radial bores in the enlarged portion of the body with convex outer ends conforming to the inner faces of the recesses and reduced tapered inner ends slidable in reduced inner portions of said radial bores and forming. inwardly facing shoulders, said radial bores having annular outwardly facing shoulders therein at the outer ends of the reduced portions thereof, springs on said reduced portions between saidinwardly and outward-facing shoulders. toiforce thev pins against said cams, and a radial knob on the ring periphery to turn the ring in a limitedarc in opposite directions with the rotational. range allowed by the rotational adjustment. and fixing of the-body in the circular bore of the frame .by the. set screw to vary the gripping, action. ofv the tapered pins 9 against the needle: when. the ring is turned .in one. direction and :to: release thesame inthe opposite direction.

ERNEST LR. POST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 952,364 Schultis Mar. 15, 1910 1,076,710 Schultis Oct. '28, 1913 1,221,556 McEaehron Apr. 3, 1917 1,302,619 Woglom- May 6, 1919 1,359,271 Plummer Nov. 16, 1920 1,533,875 McCleary Apr. 14, 192 1,565,227 Garrison Dec. 8, 1925 1,677,889. Gairing' July 24, 1928 

